First check the radiator cap and thermostat. Then check all coolant pipes, it might be that coolant is leaking?
As you said fans are working automatically it means fans are working properly.
In order to check the gasket, open the radiator cap in cold morning, fill the radiator with water and in resorvior if less, then start the car in cold morning, if water/coolant shout out from radiator opening, its means head gasket has gone. This is one of the best option of checking the head gasket problem.
Also water/coolant is reducing there is sign of headgasket failure or your block is ending now.
First check the that I said to you and update us with results here.